Home / 13,337.78-19,999.20-8,396.78

Finding the Fourth Proportional to 13,337.78, 19,999.20 and 8,396.78

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Solution

The fourth proportional to 13,337.78, 19,999.20 and 8,396.78 is: 12,590.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,337.78 : 19,999.20 = 8,396.78 : x
  2. Step 2: Convert to fraction form
    13,337.78/19,999.20 = 8,396.78/x
  3. Step 3: Cross multiply
    13,337.78x = 19,999.20 × 8,396.78
  4. Step 4: Simplify right side
    13,337.78x = 167,928,882.58
  5. Step 5: Solve for x
    x = 167,928,882.58/13,337.78
  6. Step 6: Final answer
    x = 12,590.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.